function Throughput =  GetLinkThroughputs (filename)
    Throughput = [];
    link_set = importdata ('link_set.txt');
    stable_pdr = importdata(filename);
    [m,n] = size (link_set); % m=11, n = 2
    [p,q] = size (stable_pdr);
    for i = 1:m
        received_packets = 0;
        for j =1:p
            if stable_pdr(j,1) == link_set(i,1) && stable_pdr(j,2) == link_set(i,2)
                received_packets = stable_pdr(j,4);
                break;
            end
        end
        Throughput = [Throughput; received_packets];
    end
end